Update for edge dm-core
Update for edge dm-core

* AbstractAdapter#initialize_identity_field was renamed to #initialize_serial.
  59c7d618ec367b546e130a33eebcd2e989c066bf

* I didn't find the relevant commit for the other change :-)

whoahbot/dm-redis-adapter,komagata/dm-redis-adapter,Narazaka/dm-redis-adapter